Carrier for pneumatic-despatch-tube apparatus.



PATENTED NOV. 19, 1907.

I. W. LITGHFIELD. CARRIER FOR PNBUMATIC DESPATGH TUBE APPARATUS.

APPLICATION FILED JAN. 29

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vUNITED sTATEs PATENT oEEIoE.

ISAAC W. LITCHFIELD, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO LAMSON CONSOLI- DATED STORE SERVICE COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

CARRIER FOR PNEUMATIC-DESPATCH-TUBE APPARATUS.V

Specication of Letters Patent.

Patented Nov. 19, 1907.

Application iled January 29- 1906. Serial No. 298.306.

`even clearance between the telescoping sur faces of the inner and outer shells preventing binding in case of indentation of the outer shell.

In the following drawings which illustrate two forms of construction embodying my in- Vention,-Figure 1 is a longitudinal sectional view of one form. Fig. 2 is a detail of plate carrying projection. Fig. 3 is a perspective view of inner shell. Fig. 4 is a perspective view of outer shell. Fig. 5 is a longitudinal section of a modification of the carrier. Fig. 6 is a cross section on line Fig. 5, looking direction indicated by arrow. is a perspective view of. outer shell of modification. Fig. S is a perspective view of inner shell of modification.

Like letters of reference refer to like parts throughout the several views.

The plate O carrying the projection D is mounted between the felt E and the closed end of the inner shell A and held in position by screws G mounted in holes P and screwed into threaded plate or nut H on the inside of said shell A. Washer F supports the head of the screws preventing them from tearing through the felt. Buffer E is attached to the closed end of outer shell B by screws G 'fastened into threaded nut Hf.

Part of the open end of the outer shell B is cut away forming stops J-J, which, when the shells are telescoped in operating position limit the rotation of the inner shezll A by engaging the stop or projection D. The projection K located near the open end of the outer shell Brion the inner side thereof, is adapteddto co'perate with the recess or circumferential groove L near the open endYA of the inner shell A (see Fig. l) thereby preventing the longitudinal separation of the shells while the rotation is limited by the projection D engaging the stops J. Suflicient rotation of the shells is permitted by the stops to allow the coperation or closing of the openings.

If it is desired to separate the shells, the screws G are loosened sufficiently to allow the projection D on the plate O to slide past the stops J until the vprojection K registers with opening M when the shells may be separated.

In the modification shown in Fig. 5, the i plate c is held between the buffer C and the closed end of the inner shell a. by screws g set in nut h. The outer shell b carries the b'ufler c attached to the closed end thereof by screws g set in nut h. The stops jj located at the open end of the shell l) are adapted to limit the rotation of the shells by engaging This rotative the projection d on plate c? movement is sullicient to allow the cooperation and closing of the openings o and n in shells b and (L respectively. The circunil'erential strips l and l located on the outer periphery of the inner shell a, one near each end, are adapted to maintain an even space between said inner shell a and the outer shell l), thereby preventing binding in case of indentation of the outer shell. The internal projection k on the outer shell b is adapted to engage with the strip Z preventing longitudinal separation of the shells during the limited rotation thereof. If desired to separate said shells the screwsg are loosened sulliciently to allow the projection d to pass stops j*y upon rotation until, the internal projection lc registers with openinO-s m and m in circumferential strips l and?,

when the shells may be readily separated.

IIaving thus described my invention and set forth a construction embodying the same, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a carrier for pneumatic despatch tube apparatus, two cylindrical telescoping members, said members rotatable one within the other, each having a corresponding peripheral opening therein, said openings cooperative upon rotation of said members, and means for maintaining a clearance between the curved surfaces of the inner and outer telescoping members.

` adapted to engage said projection thereby opening and closing of the openings therein,

stops on the open end oi' the outer member adapted to engage said projection thereby limiting the rotation of the members to the 3. In a carrier for pneumatic despatch tube apparatus, two cylindrical. telescoping members, the outer end of each member being closed and carrying a buffer attached thereto, said members rotatable onev within the other, each having a corresponding peripheral opening therein, said openings co operative upon rotation of said members, a plate carrying a projection and rigidly mounted between the closed end of the inner member and the buffer attached thereto,

limiting the rotation of the members to the j opening and closing ofthe openings therein, acircular recess or groove in one member, and a projection or guide in the other mem. ber adapted to cooperate with said recess thereby normally preventing separation of the members. f

4. In a vcarrier for pneumatic despatch tube apparatus, two cylindrical telescoping members, the outer end of each member being closed and carrying a buffer attached thereto, said members rotatable one within the other, each having a corresponding peripheral opening therein, said openings cooperative upon rotation of said members, a plate carrying a projection and rigidly mounted between the closed end of the inner member and the bul'er attached thereto, stops on the open end of the outer member adapted to engage said projection thereby limiting the rotation of the members to the ,opening and closing of the openings therein,

a circular recess or groove in one member, a projection or guide 1n the other member adapted to cooperate with said recess there- .by normally preventing separation of the members, and means for `separating said members upon disengagement of said projection with said stops.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses, this seventeenth day of January, A. D. 1906.

ISAAC W. LITCHFIELD.

Witnesses L A. S. TEMPLE, E. ZEMMIN. 

